Solutions Ch. 5, 11-20

NOTE: THE REFERENCE TO EXAM 1 PBLM 6 IS OBSOLETE AND REFERS TO A PREVIOUS SEMESTER. BUT REFER TO HWK CH 1: 35(c) INSTEAD.
CONCERNING MULTIPLE SOLUTIONS TO PBLMS 17-19, READ THIS.

THE FOLLOWING ARE THE ROUTINE APPROACHES TO 17-20 (READ THIS).